when they run good they run vary good . And if you want it to run good and stay that way and NOT have issues with the exhaust valves then you only run 30 weight LOW ASH OIL . Before you even think about adjusting the valves take a good long look at the rocker arms for the ware pattern as they always ware off to one side of the rocker arm . Now you can have them refaced by a automotive machine shop if and when you are doing the head or you can just watch how you insert the feeler gauge and keep the feeler gauge only on the worn part to get a good valve set . When setting the valves you do not have to run the engine till hot as long as the temp of everything is above 70-75 degrees . Ing timing is vary important with these engines and on a early 263 in a 706 it is set at 23 degrees at rated high ideal . If you get the idea of putting new sleeves in these engines then you need to see what bore class each hole is as one size does not fit all. On the deck of the block at each hole there is two letters stamped , there will be either a A-B or a C-D . A-B is what comes in the off the shelf kits and will fit but will be to loose in a C -D class bore .
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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